Can you tell me how I find TDC without removing the radiator and looking at camshaft sprocket? Do I just turn until lobes are down and away from rocker or is there a more accurate method to find it? Thanks

Rotate the engine to TDC using the mark on the crank pulley, then work with cylinder 1. Once done with that cylinder, rotate engine until cylinder 2 valves are on the round part of the camshaft, intake and exhaust. Adjust valves and move onto the next cylinder following the same steps.